CVE-2026-21521
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2026-01-22

Last updated on: 2026-02-02

Assigner: Microsoft Corporation

Description
Improper neutralization of escape, meta, or control sequences in Copilot allows an unauthorized attacker to disclose information over a network.
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Meta Information
Published
2026-01-22
Last Modified
2026-02-02
Generated
2026-06-16
AI Q&A
2026-01-23
EPSS Evaluated
2026-06-15
NVD
CVE-2026-21521
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
microsoft 365_word_copilot *
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-150 The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could be interpreted as escape, meta, or control character sequences when they are sent to a downstream component.
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Executive Summary

This vulnerability involves improper neutralization of escape, meta, or control sequences in Copilot, which allows an unauthorized attacker to disclose information over a network.

Impact Analysis

The vulnerability can lead to unauthorized disclosure of sensitive information over a network, potentially exposing confidential data to attackers.

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